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Special Forums Cybersecurity 'Shell Shock' vulnerability in Bourne shell Post 302918948 by cjcox on Friday 26th of September 2014 10:23:35 AM
Old 09-26-2014
You can apply the incomplete patches today and wait for the complete patch when available.

If that's not doable, make sure you use something other than bash (e.g. ksh, dash, ash, etc) for the shell on anything exposed or indirectly exposed. The flaw is huge and very exploitable from a remote host especially for web based stuff. And there are very popular *panels* (hint) that have such exposures.

For all of you that think all scripts should be written in unportable bash... maybe that wasn't the greatest strategy eh?? Bourne shell for the win!
 

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shells(4)							   File Formats 							 shells(4)

NAME
shells - shell database SYNOPSIS
/etc/shells DESCRIPTION
The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser- shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root. A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by the routines which search the file. Blank lines are also ignored. The following default shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/pfcsh, /bin/pfksh, /bin/pfsh, /bin/sh, /bin/tcsh, /bin/zsh, /sbin/jsh, /sbin/sh, /usr/bin/bash, /usr/bin/csh, /usr/bin/jsh, /usr/bin/ksh, /usr/bin/pfcsh, /usr/bin/pfksh, /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh. Note that /etc/shells overrides the default list. Invalid shells in /etc/shells may cause unexpected behavior (such as being unable to log in by way of ftp(1)). FILES
/etc/shells lists shells on system SEE ALSO
vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4) SunOS 5.10 4 Jun 2001 shells(4)
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